Narrow ware loom



Oct. 10, 1939. w, PRESTON 2,175,311

NARRIOW WARE LOOM' Filed May 13, 1939 INVENTOR, Fran k/l/ Fresion ATTORNEY.

Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE r v 2,175,311 gmli ow WARE LOOM Frank Preston,Paterson, N.'J.

Appucation Ma iaissa, Serial No. 273,437

t i 3 0laims. (01.139 13?) This invention relates generally to narrow. ware looms characterized by an auxiliary batten structure including superposed shuttle-races for corresponding banks of shuttles and capable of up or down movement on selection, as bya pattern means, so that, if desired, first one andthen another of the banks (they carrying diiferentcolors or other qualities of weft) may serve some single bank of warp-sheds. When anyone shuttle bank is brought to the weaving plane it should. be

driven independently of the others, wherefore the V Ryon Patent No. 781,967 discloses a mechanical motion comprising coaxial independently driven cams, connected respectively;.with the shuttle. banks, and a constantly rotated driver which is movable axially, as by pattern means, to position to drive any oneindependently of the other cams.

My invention isan improvement on this Ryon mechanism, but in order to explain wherein it is so it may be well first to allude to that mechanism more in detail. Each cam is characterized by four peripheral toothed segments alternating with concave peripheral plain or dwell segments. The driver has a peripheral toothed section to mesh and coact with that one of the toothed segments of the cams with respect to which it has been axially positioned for that purpose, but all the rest of its perimeter is cylindrical. On each quarter-revolution the driver rotates one cam a quarter-revolution while maintaining the others at dwell, but during the remainder of its complete cycle it maintains all the cams at dwellby the engagement of its cylindrical surface with their dwell segments. Any quarter-revolution of a cam produces a movement one way or the other of the corresponding shuttle-bank, the actuating part of the cam for this purpose being 8- shaped, as an 8-shaped groove.

In order for the driver to put a cam in motion it is necessary that at least the leading end tooth of the drivers toothed section be formed larger than the others, the cam having a correspondingly enlarged recess to receive it. Under the constant impact of this tooth with the cams it frequently is broken off, which puts the whole system out of commission. Occasionally more of the driver than merely this tooth is damaged. As the Ryon system is constructed it is a tedious and time-wasting operation to remove the driver and either replace it with a new one in case it is an integral structure or replace the defective section thereof. One object of this invention is therefore to improve the system in question by so constructing the driver that it may be repaired without-bodily removal thereof and that it may be readily convertible for actuating any one or'two or more cams at a. time. 1

:In thedrawing, I

Fig. l is.a side elevation, partly in section, and Fig. 2 a right-hand'elevation of the improved system;

-.Fig. 3 is a right-hand elevation of the driven body; and i Fig. 4 is an isometric View of a dwell segment.

also has formed around its axis a camway 5, as"

a. groove, generally B-shapedrw With this camway engages a part of a lever6, as a roller 6a.- thereon, which lever isto be connected by means,

1 with some .medium -.for transmitting movement to the rack orequivalent for driving that one of the shuttle-banks which appertains to theparticular cam, all .as in the said Ryon patent. Theilevers -6, alternate withthe cams.

On a shaft 8 parallel to shaft 2 and suitably constantly rotated in one direction is my improved driver, splined to the shaft so that it may be shifted axially thereof. This driver is constructed as follows:

A cylindrical body 9, having the splined connection with the shaft, and also having an extension sleeve Sw formed with a peripheral grooved head 9b by which it may be shifted axially, has a sector-shaped recess I 0 formed therein which in this example extends "from near one end to near the other end thereof, whose arcuate extent at the perimeter of the body approximates 120, and whose radial extent is here from the bore of the body to its perimeter.

Four sector-shaped elements are simultaneously to occupy this space, being all of equal width. These may be selected from a set of seven of them, or four, as H, having toothed perimeters Ila, and three, as 12, having plain perimeters l2a; the terminal teeth 1 lb of the toothed elements are enlarged, being adapted to engage in the recess 3a of the toothed segments 3 of the cams. When any one of the elements of the class I2' occupies the recess l0, its arcuate surface is exactly in the same radius as the cylindrical surface of the body 9; when any one of the class II occupies the recess its teeth project beyond such radius or so as to mesh properly with the teeth of any cam. All the elements are here of equal width.

For securing the segments in place in the recess the body 9 has extensions l3, as rabbets, of such recess extending therefrom in opposite directions around the axis and next to the perimeter of the body and each element H and I2 has lugs M to enter these recesses, screws 15 being driven through the lugs and into the body. Of course the toothed portions of the elements I l are formed to mesh and otherwise coact properly with those of the cams. Thus if any tooth or other portion of the driver breaks or becomes otherwise unserviceable the sector afiected may be replaced by another without disturbing any of the rest of the system.

The possibility of actuating any one, two or more cams constantly, or first one and then the other of any two, or first one and then the other of anyrpair, is simply a matter of properly positioning in the recess the toothed elements H or the appropriate elements H and I2.

I do not wish it to be understood that the elements occupying the recess II] at any time are necessarily separable from eachother rather than as forming a unitary, as an integral, structure or device. Suffice it to say, therefore, that the invention contemplates the driver having .a sector-shaped recess, as In, opposed to and at least approximately as wide as the group of cams and by which a sector-shaped device having peripheral teeth to mesh with at least one of the cams is filled and means to removably secure such device in the recess. Supporting structure for the shafts 2 and 8 and in which .the levers 6 are fulcrumed is shown at l6.

Having thus fully described my invention, what I claim is:

1. In combination, with supporting structure and, journaled therein, a group of identical coaxial and generally circular independently rotatable cams 'for imparting reciprocation to respective shuttle-banks of a loom, each cam having at its perimeter four equal-length toothed segments alternating with four equal-length concave dwell segments, a constantly rotating driver journaled in said structure with its axis parallel to that of the cams and including, with a cylindrical member opposite the cams and having such radius that its perimeter will enter any dwell segment of any cam when such segment is presented thereto and also having recessed a sector thereof which is in the same zone, and axially of said member is at least approximately as wide, as said group, a sector-shaped device filling said recess and having a toothed perimeter within the same zone as and arranged to mesh with and having substantially the same length as the toothed segments of any of the cams, and means to secure said device removably to said member.

2. In combination, with supporting structure .and, journaled therein, a group of identical coaxial and generally circular independently rotatable cams for imparting reciprocation to respective shuttle-banks of a loom, each cam having at its perimeter four equal-length toothed segments alternating with four equal length concave dwell segments, a constantly rotating driver journaled in said structure with its axis parallel to that of .thecams and including, with a cylindrical memberopposite the cams and having such radius that its perimeter will enter any dwell segment oflanycam when said segment is presented thereto and also having recessed a sector thereof which is .in the .same zone, and axially of said memberis at least approximately as Wide, as said group, a. group of equal-width separable sectorshaped bodies filling said recess and at least one of which is arranged in the same plane as, and has a toothed perimeter arranged to mesh with and of substantially the same length as the toothed segments of,:any of the cams, and means to secure said bodies removably to said member.

3. The combination set forth in claim 2 characterized by said member having rabbets adjacent to.its periphery and respectively reaching from .the recess inopposite directions crosswise of the axislof the driver and by said bodies having oppositely projectingilugs arranged to enter said rabbetsand byrsaid securing means being screws driven through the lugs into said member.

W. PRESTON. 

